Fair Value Measurements (Details 2) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	$ (703)	$ 5,145
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	18,912	22,033	$ 22,815	$ 17,638
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	$ (3,200)	$ (750)